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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2009 Red Hat, Inc.</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * Red Hat licenses this file to you under the Apache License, version 2.0</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * (the "License"); you may not use this file except in compliance with the</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * License.  You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *    <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.channel.socket.nio;
<a class="jxr_linenumber" name="17" href="#17">17</a>  
<a class="jxr_linenumber" name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> java.io.IOException;
<a class="jxr_linenumber" name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> java.net.InetSocketAddress;
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> java.nio.channels.SelectionKey;
<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> java.nio.channels.Selector;
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.nio.channels.ServerSocketChannel;
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.nio.channels.spi.SelectorProvider;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.util.Set;
<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.util.Map.Entry;
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.ExecutorService;
<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.Executors;
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.TimeUnit;
<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> java.util.regex.Matcher;
<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> java.util.regex.Pattern;
<a class="jxr_linenumber" name="31" href="#31">31</a>  
<a class="jxr_linenumber" name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.logging.InternalLogger;
<a class="jxr_linenumber" name="33" href="#33">33</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.logging.InternalLoggerFactory;
<a class="jxr_linenumber" name="34" href="#34">34</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.util.internal.SystemPropertyUtil;
<a class="jxr_linenumber" name="35" href="#35">35</a>  
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> * Provides information which is specific to a NIO service provider</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> * implementation.</em>
<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="http://www.jboss.org/netty/" target="alexandria_uri">http://www.jboss.org/netty/</a>"&gt;The Netty Project&lt;/a&gt;</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="http://gleamynode.net/" target="alexandria_uri">http://gleamynode.net/</a>"&gt;Trustin Lee&lt;/a&gt;</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> * @version $Rev: 2162 $, $Date: 2010-02-18 11:23:51 +0900 (Thu, 18 Feb 2010) $</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>  <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/jboss/netty/channel/socket/nio/NioProviderMetadata.html">NioProviderMetadata</a> {
<a class="jxr_linenumber" name="47" href="#47">47</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/logging/InternalLogger.html">InternalLogger</a> logger =
<a class="jxr_linenumber" name="48" href="#48">48</a>          InternalLoggerFactory.getInstance(NioProviderMetadata.<strong class="jxr_keyword">class</strong>);
<a class="jxr_linenumber" name="49" href="#49">49</a>  
<a class="jxr_linenumber" name="50" href="#50">50</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String CONSTRAINT_LEVEL_PROPERTY =
<a class="jxr_linenumber" name="51" href="#51">51</a>          <span class="jxr_string">"org.jboss.netty.channel.socket.nio.constraintLevel"</span>;
<a class="jxr_linenumber" name="52" href="#52">52</a>  
<a class="jxr_linenumber" name="53" href="#53">53</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String OLD_CONSTRAINT_LEVEL_PROPERTY =
<a class="jxr_linenumber" name="54" href="#54">54</a>          <span class="jxr_string">"java.nio.channels.spi.constraintLevel"</span>;
<a class="jxr_linenumber" name="55" href="#55">55</a>  
<a class="jxr_linenumber" name="56" href="#56">56</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_javadoccomment">     * 0 - no need to wake up to get / set interestOps (most cases)</em>
<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_javadoccomment">     * 1 - no need to wake up to get interestOps, but need to wake up to set.</em>
<a class="jxr_linenumber" name="59" href="#59">59</a>  <em class="jxr_javadoccomment">     * 2 - need to wake up to get / set interestOps    (old providers)</em>
<a class="jxr_linenumber" name="60" href="#60">60</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="61" href="#61">61</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> CONSTRAINT_LEVEL;
<a class="jxr_linenumber" name="62" href="#62">62</a>  
<a class="jxr_linenumber" name="63" href="#63">63</a>      <strong class="jxr_keyword">static</strong> {
<a class="jxr_linenumber" name="64" href="#64">64</a>          <strong class="jxr_keyword">int</strong> constraintLevel = -1;
<a class="jxr_linenumber" name="65" href="#65">65</a>  
<a class="jxr_linenumber" name="66" href="#66">66</a>          <em class="jxr_comment">// Use the system property if possible.</em>
<a class="jxr_linenumber" name="67" href="#67">67</a>          constraintLevel = SystemPropertyUtil.get(CONSTRAINT_LEVEL_PROPERTY, -1);
<a class="jxr_linenumber" name="68" href="#68">68</a>          <strong class="jxr_keyword">if</strong> (constraintLevel &lt; 0 || constraintLevel &gt; 2) {
<a class="jxr_linenumber" name="69" href="#69">69</a>              <em class="jxr_comment">// Try the old property.</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>              constraintLevel = SystemPropertyUtil.get(OLD_CONSTRAINT_LEVEL_PROPERTY, -1);
<a class="jxr_linenumber" name="71" href="#71">71</a>              <strong class="jxr_keyword">if</strong> (constraintLevel &lt; 0 || constraintLevel &gt; 2) {
<a class="jxr_linenumber" name="72" href="#72">72</a>                  constraintLevel = -1;
<a class="jxr_linenumber" name="73" href="#73">73</a>              } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="74" href="#74">74</a>                  logger.warn(
<a class="jxr_linenumber" name="75" href="#75">75</a>                          <span class="jxr_string">"System property '"</span> +
<a class="jxr_linenumber" name="76" href="#76">76</a>                          OLD_CONSTRAINT_LEVEL_PROPERTY +
<a class="jxr_linenumber" name="77" href="#77">77</a>                          <span class="jxr_string">"' has been deprecated.  Use '"</span> +
<a class="jxr_linenumber" name="78" href="#78">78</a>                          CONSTRAINT_LEVEL_PROPERTY + <span class="jxr_string">"' instead."</span>);
<a class="jxr_linenumber" name="79" href="#79">79</a>              }
<a class="jxr_linenumber" name="80" href="#80">80</a>          }
<a class="jxr_linenumber" name="81" href="#81">81</a>  
<a class="jxr_linenumber" name="82" href="#82">82</a>          <strong class="jxr_keyword">if</strong> (constraintLevel &gt;= 0) {
<a class="jxr_linenumber" name="83" href="#83">83</a>              logger.debug(
<a class="jxr_linenumber" name="84" href="#84">84</a>                      <span class="jxr_string">"Setting the NIO constraint level to: "</span> + constraintLevel);
<a class="jxr_linenumber" name="85" href="#85">85</a>          }
<a class="jxr_linenumber" name="86" href="#86">86</a>  
<a class="jxr_linenumber" name="87" href="#87">87</a>          <strong class="jxr_keyword">if</strong> (constraintLevel &lt; 0) {
<a class="jxr_linenumber" name="88" href="#88">88</a>              constraintLevel = detectConstraintLevelFromSystemProperties();
<a class="jxr_linenumber" name="89" href="#89">89</a>  
<a class="jxr_linenumber" name="90" href="#90">90</a>              <strong class="jxr_keyword">if</strong> (constraintLevel &lt; 0) {
<a class="jxr_linenumber" name="91" href="#91">91</a>                  constraintLevel = 2;
<a class="jxr_linenumber" name="92" href="#92">92</a>                  logger.debug(
<a class="jxr_linenumber" name="93" href="#93">93</a>                          <span class="jxr_string">"Couldn't determine the NIO constraint level from "</span> +
<a class="jxr_linenumber" name="94" href="#94">94</a>                          <span class="jxr_string">"the system properties; using the safest level (2)"</span>);
<a class="jxr_linenumber" name="95" href="#95">95</a>              } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (constraintLevel != 0) {
<a class="jxr_linenumber" name="96" href="#96">96</a>                  logger.info(
<a class="jxr_linenumber" name="97" href="#97">97</a>                          <span class="jxr_string">"Using the autodetected NIO constraint level: "</span> +
<a class="jxr_linenumber" name="98" href="#98">98</a>                          constraintLevel +
<a class="jxr_linenumber" name="99" href="#99">99</a>                          <span class="jxr_string">" (Use better NIO provider for better performance)"</span>);
<a class="jxr_linenumber" name="100" href="#100">100</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="101" href="#101">101</a>                 logger.debug(
<a class="jxr_linenumber" name="102" href="#102">102</a>                         <span class="jxr_string">"Using the autodetected NIO constraint level: "</span> +
<a class="jxr_linenumber" name="103" href="#103">103</a>                         constraintLevel);
<a class="jxr_linenumber" name="104" href="#104">104</a>             }
<a class="jxr_linenumber" name="105" href="#105">105</a>         }
<a class="jxr_linenumber" name="106" href="#106">106</a> 
<a class="jxr_linenumber" name="107" href="#107">107</a>         CONSTRAINT_LEVEL = constraintLevel;
<a class="jxr_linenumber" name="108" href="#108">108</a> 
<a class="jxr_linenumber" name="109" href="#109">109</a>         <strong class="jxr_keyword">if</strong> (CONSTRAINT_LEVEL &lt; 0 || CONSTRAINT_LEVEL &gt; 2) {
<a class="jxr_linenumber" name="110" href="#110">110</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> Error(
<a class="jxr_linenumber" name="111" href="#111">111</a>                     <span class="jxr_string">"Unexpected NIO constraint level: "</span> +
<a class="jxr_linenumber" name="112" href="#112">112</a>                     CONSTRAINT_LEVEL + <span class="jxr_string">", please report this error."</span>);
<a class="jxr_linenumber" name="113" href="#113">113</a>         }
<a class="jxr_linenumber" name="114" href="#114">114</a>     }
<a class="jxr_linenumber" name="115" href="#115">115</a> 
<a class="jxr_linenumber" name="116" href="#116">116</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> detectConstraintLevelFromSystemProperties() {
<a class="jxr_linenumber" name="117" href="#117">117</a>         String version = SystemPropertyUtil.get(<span class="jxr_string">"java.specification.version"</span>);
<a class="jxr_linenumber" name="118" href="#118">118</a>         String vminfo = SystemPropertyUtil.get(<span class="jxr_string">"java.vm.info"</span>, <span class="jxr_string">""</span>);
<a class="jxr_linenumber" name="119" href="#119">119</a>         String os = SystemPropertyUtil.get(<span class="jxr_string">"os.name"</span>);
<a class="jxr_linenumber" name="120" href="#120">120</a>         String vendor = SystemPropertyUtil.get(<span class="jxr_string">"java.vm.vendor"</span>);
<a class="jxr_linenumber" name="121" href="#121">121</a>         String provider;
<a class="jxr_linenumber" name="122" href="#122">122</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="123" href="#123">123</a>             provider = SelectorProvider.provider().getClass().getName();
<a class="jxr_linenumber" name="124" href="#124">124</a>         } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a class="jxr_linenumber" name="125" href="#125">125</a>             <em class="jxr_comment">// Perhaps security exception.</em>
<a class="jxr_linenumber" name="126" href="#126">126</a>             provider = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="127" href="#127">127</a>         }
<a class="jxr_linenumber" name="128" href="#128">128</a> 
<a class="jxr_linenumber" name="129" href="#129">129</a>         <strong class="jxr_keyword">if</strong> (version == <strong class="jxr_keyword">null</strong> || os == <strong class="jxr_keyword">null</strong> || vendor == <strong class="jxr_keyword">null</strong> || provider == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="130" href="#130">130</a>             <strong class="jxr_keyword">return</strong> -1;
<a class="jxr_linenumber" name="131" href="#131">131</a>         }
<a class="jxr_linenumber" name="132" href="#132">132</a> 
<a class="jxr_linenumber" name="133" href="#133">133</a>         os = os.toLowerCase();
<a class="jxr_linenumber" name="134" href="#134">134</a>         vendor = vendor.toLowerCase();
<a class="jxr_linenumber" name="135" href="#135">135</a> 
<a class="jxr_linenumber" name="136" href="#136">136</a> <em class="jxr_comment">//        System.out.println(version);</em>
<a class="jxr_linenumber" name="137" href="#137">137</a> <em class="jxr_comment">//        System.out.println(vminfo);</em>
<a class="jxr_linenumber" name="138" href="#138">138</a> <em class="jxr_comment">//        System.out.println(os);</em>
<a class="jxr_linenumber" name="139" href="#139">139</a> <em class="jxr_comment">//        System.out.println(vendor);</em>
<a class="jxr_linenumber" name="140" href="#140">140</a> <em class="jxr_comment">//        System.out.println(provider);</em>
<a class="jxr_linenumber" name="141" href="#141">141</a> 
<a class="jxr_linenumber" name="142" href="#142">142</a>         <em class="jxr_comment">// Sun JVM</em>
<a class="jxr_linenumber" name="143" href="#143">143</a>         <strong class="jxr_keyword">if</strong> (vendor.indexOf(<span class="jxr_string">"sun"</span>) &gt;= 0) {
<a class="jxr_linenumber" name="144" href="#144">144</a>             <em class="jxr_comment">// Linux</em>
<a class="jxr_linenumber" name="145" href="#145">145</a>             <strong class="jxr_keyword">if</strong> (os.indexOf(<span class="jxr_string">"linux"</span>) &gt;= 0) {
<a class="jxr_linenumber" name="146" href="#146">146</a>                 <strong class="jxr_keyword">if</strong> (provider.equals(<span class="jxr_string">"sun.nio.ch.EPollSelectorProvider"</span>) ||
<a class="jxr_linenumber" name="147" href="#147">147</a>                     provider.equals(<span class="jxr_string">"sun.nio.ch.PollSelectorProvider"</span>)) {
<a class="jxr_linenumber" name="148" href="#148">148</a>                     <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="149" href="#149">149</a>                 }
<a class="jxr_linenumber" name="150" href="#150">150</a> 
<a class="jxr_linenumber" name="151" href="#151">151</a>             <em class="jxr_comment">// Windows</em>
<a class="jxr_linenumber" name="152" href="#152">152</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (os.indexOf(<span class="jxr_string">"windows"</span>) &gt;= 0) {
<a class="jxr_linenumber" name="153" href="#153">153</a>                 <strong class="jxr_keyword">if</strong> (provider.equals(<span class="jxr_string">"sun.nio.ch.WindowsSelectorProvider"</span>)) {
<a class="jxr_linenumber" name="154" href="#154">154</a>                     <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="155" href="#155">155</a>                 }
<a class="jxr_linenumber" name="156" href="#156">156</a> 
<a class="jxr_linenumber" name="157" href="#157">157</a>             <em class="jxr_comment">// Solaris</em>
<a class="jxr_linenumber" name="158" href="#158">158</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (os.indexOf(<span class="jxr_string">"sun"</span>) &gt;= 0 || os.indexOf(<span class="jxr_string">"solaris"</span>) &gt;= 0) {
<a class="jxr_linenumber" name="159" href="#159">159</a>                 <strong class="jxr_keyword">if</strong> (provider.equals(<span class="jxr_string">"sun.nio.ch.DevPollSelectorProvider"</span>)) {
<a class="jxr_linenumber" name="160" href="#160">160</a>                     <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="161" href="#161">161</a>                 }
<a class="jxr_linenumber" name="162" href="#162">162</a>             }
<a class="jxr_linenumber" name="163" href="#163">163</a>         <em class="jxr_comment">// Apple JVM</em>
<a class="jxr_linenumber" name="164" href="#164">164</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (vendor.indexOf(<span class="jxr_string">"apple"</span>) &gt;= 0) {
<a class="jxr_linenumber" name="165" href="#165">165</a>             <em class="jxr_comment">// Mac OS</em>
<a class="jxr_linenumber" name="166" href="#166">166</a>             <strong class="jxr_keyword">if</strong> (os.indexOf(<span class="jxr_string">"mac"</span>) &gt;= 0 &amp;&amp; os.indexOf(<span class="jxr_string">"os"</span>) &gt;= 0) {
<a class="jxr_linenumber" name="167" href="#167">167</a>                 <strong class="jxr_keyword">if</strong> (provider.equals(<span class="jxr_string">"sun.nio.ch.KQueueSelectorProvider"</span>)) {
<a class="jxr_linenumber" name="168" href="#168">168</a>                     <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="169" href="#169">169</a>                 }
<a class="jxr_linenumber" name="170" href="#170">170</a>             }
<a class="jxr_linenumber" name="171" href="#171">171</a>         <em class="jxr_comment">// IBM</em>
<a class="jxr_linenumber" name="172" href="#172">172</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (vendor.indexOf(<span class="jxr_string">"ibm"</span>) &gt;= 0) {
<a class="jxr_linenumber" name="173" href="#173">173</a>             <em class="jxr_comment">// Linux or AIX</em>
<a class="jxr_linenumber" name="174" href="#174">174</a>             <strong class="jxr_keyword">if</strong> (os.indexOf(<span class="jxr_string">"linux"</span>) &gt;= 0 || os.indexOf(<span class="jxr_string">"aix"</span>) &gt;= 0) {
<a class="jxr_linenumber" name="175" href="#175">175</a>                 <strong class="jxr_keyword">if</strong> (version.equals(<span class="jxr_string">"1.5"</span>) || version.matches(<span class="jxr_string">"^1&#92;&#92;.5&#92;&#92;D.*$"</span>)) {
<a class="jxr_linenumber" name="176" href="#176">176</a>                     <strong class="jxr_keyword">if</strong> (provider.equals(<span class="jxr_string">"sun.nio.ch.PollSelectorProvider"</span>)) {
<a class="jxr_linenumber" name="177" href="#177">177</a>                         <strong class="jxr_keyword">return</strong> 1;
<a class="jxr_linenumber" name="178" href="#178">178</a>                     }
<a class="jxr_linenumber" name="179" href="#179">179</a>                 } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (version.equals(<span class="jxr_string">"1.6"</span>) || version.matches(<span class="jxr_string">"^1&#92;&#92;.6&#92;&#92;D.*$"</span>)) {
<a class="jxr_linenumber" name="180" href="#180">180</a>                     <em class="jxr_comment">// IBM JDK 1.6 has different constraint level for different</em>
<a class="jxr_linenumber" name="181" href="#181">181</a>                     <em class="jxr_comment">// version.  The exact version can be determined only by its</em>
<a class="jxr_linenumber" name="182" href="#182">182</a>                     <em class="jxr_comment">// build date.</em>
<a class="jxr_linenumber" name="183" href="#183">183</a>                     Pattern datePattern = Pattern.compile(
<a class="jxr_linenumber" name="184" href="#184">184</a>                             <span class="jxr_string">"(?:^|[^0-9])("</span> +
<a class="jxr_linenumber" name="185" href="#185">185</a>                             <span class="jxr_string">"[2-9][0-9]{3}"</span> +              <em class="jxr_comment">// year</em>
<a class="jxr_linenumber" name="186" href="#186">186</a>                             <span class="jxr_string">"(?:0[1-9]|1[0-2])"</span> +          <em class="jxr_comment">// month</em>
<a class="jxr_linenumber" name="187" href="#187">187</a>                             <span class="jxr_string">"(?:0[1-9]|[12][0-9]|3[01])"</span> + <em class="jxr_comment">// day of month</em>
<a class="jxr_linenumber" name="188" href="#188">188</a>                             <span class="jxr_string">")(?:$|[^0-9])"</span>);
<a class="jxr_linenumber" name="189" href="#189">189</a> 
<a class="jxr_linenumber" name="190" href="#190">190</a>                     Matcher dateMatcher = datePattern.matcher(vminfo);
<a class="jxr_linenumber" name="191" href="#191">191</a>                     <strong class="jxr_keyword">if</strong> (dateMatcher.find()) {
<a class="jxr_linenumber" name="192" href="#192">192</a>                         <strong class="jxr_keyword">long</strong> dateValue = Long.parseLong(dateMatcher.group(1));
<a class="jxr_linenumber" name="193" href="#193">193</a>                         <strong class="jxr_keyword">if</strong> (dateValue &lt; 20081105L) {
<a class="jxr_linenumber" name="194" href="#194">194</a>                             <em class="jxr_comment">// SR0, 1, and 2</em>
<a class="jxr_linenumber" name="195" href="#195">195</a>                             <strong class="jxr_keyword">return</strong> 2;
<a class="jxr_linenumber" name="196" href="#196">196</a>                         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="197" href="#197">197</a>                             <em class="jxr_comment">// SR3 and later</em>
<a class="jxr_linenumber" name="198" href="#198">198</a>                             <strong class="jxr_keyword">if</strong> (provider.equals(<span class="jxr_string">"sun.nio.ch.EPollSelectorProvider"</span>)) {
<a class="jxr_linenumber" name="199" href="#199">199</a>                                 <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="200" href="#200">200</a>                             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (provider.equals(<span class="jxr_string">"sun.nio.ch.PollSelectorProvider"</span>)) {
<a class="jxr_linenumber" name="201" href="#201">201</a>                                 <strong class="jxr_keyword">return</strong> 1;
<a class="jxr_linenumber" name="202" href="#202">202</a>                             }
<a class="jxr_linenumber" name="203" href="#203">203</a>                         }
<a class="jxr_linenumber" name="204" href="#204">204</a>                     }
<a class="jxr_linenumber" name="205" href="#205">205</a>                 }
<a class="jxr_linenumber" name="206" href="#206">206</a>             }
<a class="jxr_linenumber" name="207" href="#207">207</a>         <em class="jxr_comment">// BEA</em>
<a class="jxr_linenumber" name="208" href="#208">208</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (vendor.indexOf(<span class="jxr_string">"bea"</span>) &gt;= 0 || vendor.indexOf(<span class="jxr_string">"oracle"</span>) &gt;= 0) {
<a class="jxr_linenumber" name="209" href="#209">209</a>             <em class="jxr_comment">// Linux</em>
<a class="jxr_linenumber" name="210" href="#210">210</a>             <strong class="jxr_keyword">if</strong> (os.indexOf(<span class="jxr_string">"linux"</span>) &gt;= 0) {
<a class="jxr_linenumber" name="211" href="#211">211</a>                 <strong class="jxr_keyword">if</strong> (provider.equals(<span class="jxr_string">"sun.nio.ch.EPollSelectorProvider"</span>) ||
<a class="jxr_linenumber" name="212" href="#212">212</a>                     provider.equals(<span class="jxr_string">"sun.nio.ch.PollSelectorProvider"</span>)) {
<a class="jxr_linenumber" name="213" href="#213">213</a>                     <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="214" href="#214">214</a>                 }
<a class="jxr_linenumber" name="215" href="#215">215</a> 
<a class="jxr_linenumber" name="216" href="#216">216</a>             <em class="jxr_comment">// Windows</em>
<a class="jxr_linenumber" name="217" href="#217">217</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (os.indexOf(<span class="jxr_string">"windows"</span>) &gt;= 0) {
<a class="jxr_linenumber" name="218" href="#218">218</a>                 <strong class="jxr_keyword">if</strong> (provider.equals(<span class="jxr_string">"sun.nio.ch.WindowsSelectorProvider"</span>)) {
<a class="jxr_linenumber" name="219" href="#219">219</a>                     <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="220" href="#220">220</a>                 }
<a class="jxr_linenumber" name="221" href="#221">221</a>             }
<a class="jxr_linenumber" name="222" href="#222">222</a>         <em class="jxr_comment">// Apache Software Foundation</em>
<a class="jxr_linenumber" name="223" href="#223">223</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (vendor.indexOf(<span class="jxr_string">"apache"</span>) &gt;= 0) {
<a class="jxr_linenumber" name="224" href="#224">224</a>             <strong class="jxr_keyword">if</strong> (provider.equals(<span class="jxr_string">"org.apache.harmony.nio.internal.SelectorProviderImpl"</span>)) {
<a class="jxr_linenumber" name="225" href="#225">225</a>                 <strong class="jxr_keyword">return</strong> 1;
<a class="jxr_linenumber" name="226" href="#226">226</a>             }
<a class="jxr_linenumber" name="227" href="#227">227</a>         }
<a class="jxr_linenumber" name="228" href="#228">228</a> 
<a class="jxr_linenumber" name="229" href="#229">229</a>         <em class="jxr_comment">// Others (untested)</em>
<a class="jxr_linenumber" name="230" href="#230">230</a>         <strong class="jxr_keyword">return</strong> -1;
<a class="jxr_linenumber" name="231" href="#231">231</a>     }
<a class="jxr_linenumber" name="232" href="#232">232</a> 
<a class="jxr_linenumber" name="233" href="#233">233</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/jboss/netty/channel/socket/nio/NioProviderMetadata.html">ConstraintLevelAutodetector</a> {
<a class="jxr_linenumber" name="234" href="#234">234</a> 
<a class="jxr_linenumber" name="235" href="#235">235</a>         <a href="../../../../../../org/jboss/netty/channel/socket/nio/NioProviderMetadata.html">ConstraintLevelAutodetector</a>() {
<a class="jxr_linenumber" name="236" href="#236">236</a>             <strong class="jxr_keyword">super</strong>();
<a class="jxr_linenumber" name="237" href="#237">237</a>         }
<a class="jxr_linenumber" name="238" href="#238">238</a> 
<a class="jxr_linenumber" name="239" href="#239">239</a>         <strong class="jxr_keyword">int</strong> autodetect() {
<a class="jxr_linenumber" name="240" href="#240">240</a>             <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> constraintLevel;
<a class="jxr_linenumber" name="241" href="#241">241</a>             ExecutorService executor = Executors.newCachedThreadPool();
<a class="jxr_linenumber" name="242" href="#242">242</a>             <strong class="jxr_keyword">boolean</strong> success;
<a class="jxr_linenumber" name="243" href="#243">243</a>             <strong class="jxr_keyword">long</strong> startTime;
<a class="jxr_linenumber" name="244" href="#244">244</a>             <strong class="jxr_keyword">int</strong> interestOps;
<a class="jxr_linenumber" name="245" href="#245">245</a> 
<a class="jxr_linenumber" name="246" href="#246">246</a>             ServerSocketChannel ch = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="247" href="#247">247</a>             <a href="../../../../../../org/jboss/netty/channel/socket/nio/NioProviderMetadata.html">SelectorLoop</a> loop = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="248" href="#248">248</a> 
<a class="jxr_linenumber" name="249" href="#249">249</a>             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="250" href="#250">250</a>                 <em class="jxr_comment">// Open a channel.</em>
<a class="jxr_linenumber" name="251" href="#251">251</a>                 ch = ServerSocketChannel.open();
<a class="jxr_linenumber" name="252" href="#252">252</a> 
<a class="jxr_linenumber" name="253" href="#253">253</a>                 <em class="jxr_comment">// Configure the channel</em>
<a class="jxr_linenumber" name="254" href="#254">254</a>                 <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="255" href="#255">255</a>                     ch.socket().bind(<strong class="jxr_keyword">new</strong> InetSocketAddress(0));
<a class="jxr_linenumber" name="256" href="#256">256</a>                     ch.configureBlocking(false);
<a class="jxr_linenumber" name="257" href="#257">257</a>                 } <strong class="jxr_keyword">catch</strong> (Throwable e) {
<a class="jxr_linenumber" name="258" href="#258">258</a>                     logger.warn(<span class="jxr_string">"Failed to configure a temporary socket."</span>, e);
<a class="jxr_linenumber" name="259" href="#259">259</a>                     <strong class="jxr_keyword">return</strong> -1;
<a class="jxr_linenumber" name="260" href="#260">260</a>                 }
<a class="jxr_linenumber" name="261" href="#261">261</a> 
<a class="jxr_linenumber" name="262" href="#262">262</a>                 <em class="jxr_comment">// Prepare the selector loop.</em>
<a class="jxr_linenumber" name="263" href="#263">263</a>                 <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="264" href="#264">264</a>                     loop = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/jboss/netty/channel/socket/nio/NioProviderMetadata.html">SelectorLoop</a>();
<a class="jxr_linenumber" name="265" href="#265">265</a>                 } <strong class="jxr_keyword">catch</strong> (Throwable e) {
<a class="jxr_linenumber" name="266" href="#266">266</a>                     logger.warn(<span class="jxr_string">"Failed to open a temporary selector."</span>, e);
<a class="jxr_linenumber" name="267" href="#267">267</a>                     <strong class="jxr_keyword">return</strong> -1;
<a class="jxr_linenumber" name="268" href="#268">268</a>                 }
<a class="jxr_linenumber" name="269" href="#269">269</a> 
<a class="jxr_linenumber" name="270" href="#270">270</a>                 <em class="jxr_comment">// Register the channel</em>
<a class="jxr_linenumber" name="271" href="#271">271</a>                 <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="272" href="#272">272</a>                     ch.register(loop.selector, 0);
<a class="jxr_linenumber" name="273" href="#273">273</a>                 } <strong class="jxr_keyword">catch</strong> (Throwable e) {
<a class="jxr_linenumber" name="274" href="#274">274</a>                     logger.warn(<span class="jxr_string">"Failed to register a temporary selector."</span>, e);
<a class="jxr_linenumber" name="275" href="#275">275</a>                     <strong class="jxr_keyword">return</strong> -1;
<a class="jxr_linenumber" name="276" href="#276">276</a>                 }
<a class="jxr_linenumber" name="277" href="#277">277</a> 
<a class="jxr_linenumber" name="278" href="#278">278</a>                 SelectionKey key = ch.keyFor(loop.selector);
<a class="jxr_linenumber" name="279" href="#279">279</a> 
<a class="jxr_linenumber" name="280" href="#280">280</a>                 <em class="jxr_comment">// Start the selector loop.</em>
<a class="jxr_linenumber" name="281" href="#281">281</a>                 executor.execute(loop);
<a class="jxr_linenumber" name="282" href="#282">282</a> 
<a class="jxr_linenumber" name="283" href="#283">283</a>                 <em class="jxr_comment">// Level 0</em>
<a class="jxr_linenumber" name="284" href="#284">284</a>                 success = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="285" href="#285">285</a>                 <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; 10; i ++) {
<a class="jxr_linenumber" name="286" href="#286">286</a> 
<a class="jxr_linenumber" name="287" href="#287">287</a>                     <em class="jxr_comment">// Increase the probability of calling interestOps</em>
<a class="jxr_linenumber" name="288" href="#288">288</a>                     <em class="jxr_comment">// while select() is running.</em>
<a class="jxr_linenumber" name="289" href="#289">289</a>                     <strong class="jxr_keyword">do</strong> {
<a class="jxr_linenumber" name="290" href="#290">290</a>                         <strong class="jxr_keyword">while</strong> (!loop.selecting) {
<a class="jxr_linenumber" name="291" href="#291">291</a>                             Thread.yield();
<a class="jxr_linenumber" name="292" href="#292">292</a>                         }
<a class="jxr_linenumber" name="293" href="#293">293</a> 
<a class="jxr_linenumber" name="294" href="#294">294</a>                         <em class="jxr_comment">// Wait a little bit more.</em>
<a class="jxr_linenumber" name="295" href="#295">295</a>                         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="296" href="#296">296</a>                             Thread.sleep(50);
<a class="jxr_linenumber" name="297" href="#297">297</a>                         } <strong class="jxr_keyword">catch</strong> (InterruptedException e) {
<a class="jxr_linenumber" name="298" href="#298">298</a>                             <em class="jxr_comment">// Ignore</em>
<a class="jxr_linenumber" name="299" href="#299">299</a>                         }
<a class="jxr_linenumber" name="300" href="#300">300</a>                     } <strong class="jxr_keyword">while</strong> (!loop.selecting);
<a class="jxr_linenumber" name="301" href="#301">301</a> 
<a class="jxr_linenumber" name="302" href="#302">302</a>                     startTime = System.nanoTime();
<a class="jxr_linenumber" name="303" href="#303">303</a>                     key.interestOps(key.interestOps() | SelectionKey.OP_ACCEPT);
<a class="jxr_linenumber" name="304" href="#304">304</a>                     key.interestOps(key.interestOps() &amp; ~SelectionKey.OP_ACCEPT);
<a class="jxr_linenumber" name="305" href="#305">305</a> 
<a class="jxr_linenumber" name="306" href="#306">306</a>                     <strong class="jxr_keyword">if</strong> (System.nanoTime() - startTime &gt;= 500000000L) {
<a class="jxr_linenumber" name="307" href="#307">307</a>                         success = false;
<a class="jxr_linenumber" name="308" href="#308">308</a>                         <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="309" href="#309">309</a>                     }
<a class="jxr_linenumber" name="310" href="#310">310</a>                 }
<a class="jxr_linenumber" name="311" href="#311">311</a> 
<a class="jxr_linenumber" name="312" href="#312">312</a>                 <strong class="jxr_keyword">if</strong> (success) {
<a class="jxr_linenumber" name="313" href="#313">313</a>                     constraintLevel = 0;
<a class="jxr_linenumber" name="314" href="#314">314</a>                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="315" href="#315">315</a>                     <em class="jxr_comment">// Level 1</em>
<a class="jxr_linenumber" name="316" href="#316">316</a>                     success = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="317" href="#317">317</a>                     <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; 10; i ++) {
<a class="jxr_linenumber" name="318" href="#318">318</a> 
<a class="jxr_linenumber" name="319" href="#319">319</a>                         <em class="jxr_comment">// Increase the probability of calling interestOps</em>
<a class="jxr_linenumber" name="320" href="#320">320</a>                         <em class="jxr_comment">// while select() is running.</em>
<a class="jxr_linenumber" name="321" href="#321">321</a>                         <strong class="jxr_keyword">do</strong> {
<a class="jxr_linenumber" name="322" href="#322">322</a>                             <strong class="jxr_keyword">while</strong> (!loop.selecting) {
<a class="jxr_linenumber" name="323" href="#323">323</a>                                 Thread.yield();
<a class="jxr_linenumber" name="324" href="#324">324</a>                             }
<a class="jxr_linenumber" name="325" href="#325">325</a> 
<a class="jxr_linenumber" name="326" href="#326">326</a>                             <em class="jxr_comment">// Wait a little bit more.</em>
<a class="jxr_linenumber" name="327" href="#327">327</a>                             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="328" href="#328">328</a>                                 Thread.sleep(50);
<a class="jxr_linenumber" name="329" href="#329">329</a>                             } <strong class="jxr_keyword">catch</strong> (InterruptedException e) {
<a class="jxr_linenumber" name="330" href="#330">330</a>                                 <em class="jxr_comment">// Ignore</em>
<a class="jxr_linenumber" name="331" href="#331">331</a>                             }
<a class="jxr_linenumber" name="332" href="#332">332</a>                         } <strong class="jxr_keyword">while</strong> (!loop.selecting);
<a class="jxr_linenumber" name="333" href="#333">333</a> 
<a class="jxr_linenumber" name="334" href="#334">334</a>                         startTime = System.nanoTime();
<a class="jxr_linenumber" name="335" href="#335">335</a>                         interestOps = key.interestOps();
<a class="jxr_linenumber" name="336" href="#336">336</a>                         <strong class="jxr_keyword">synchronized</strong> (loop) {
<a class="jxr_linenumber" name="337" href="#337">337</a>                             loop.selector.wakeup();
<a class="jxr_linenumber" name="338" href="#338">338</a>                             key.interestOps(interestOps | SelectionKey.OP_ACCEPT);
<a class="jxr_linenumber" name="339" href="#339">339</a>                             key.interestOps(interestOps &amp; ~SelectionKey.OP_ACCEPT);
<a class="jxr_linenumber" name="340" href="#340">340</a>                         }
<a class="jxr_linenumber" name="341" href="#341">341</a> 
<a class="jxr_linenumber" name="342" href="#342">342</a>                         <strong class="jxr_keyword">if</strong> (System.nanoTime() - startTime &gt;= 500000000L) {
<a class="jxr_linenumber" name="343" href="#343">343</a>                             success = false;
<a class="jxr_linenumber" name="344" href="#344">344</a>                             <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="345" href="#345">345</a>                         }
<a class="jxr_linenumber" name="346" href="#346">346</a>                     }
<a class="jxr_linenumber" name="347" href="#347">347</a>                     <strong class="jxr_keyword">if</strong> (success) {
<a class="jxr_linenumber" name="348" href="#348">348</a>                         constraintLevel = 1;
<a class="jxr_linenumber" name="349" href="#349">349</a>                     } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="350" href="#350">350</a>                         constraintLevel = 2;
<a class="jxr_linenumber" name="351" href="#351">351</a>                     }
<a class="jxr_linenumber" name="352" href="#352">352</a>                 }
<a class="jxr_linenumber" name="353" href="#353">353</a>             } <strong class="jxr_keyword">catch</strong> (Throwable e) {
<a class="jxr_linenumber" name="354" href="#354">354</a>                 <strong class="jxr_keyword">return</strong> -1;
<a class="jxr_linenumber" name="355" href="#355">355</a>             } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="356" href="#356">356</a>                 <strong class="jxr_keyword">if</strong> (ch != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="357" href="#357">357</a>                     <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="358" href="#358">358</a>                         ch.close();
<a class="jxr_linenumber" name="359" href="#359">359</a>                     } <strong class="jxr_keyword">catch</strong> (Throwable e) {
<a class="jxr_linenumber" name="360" href="#360">360</a>                         logger.warn(<span class="jxr_string">"Failed to close a temporary socket."</span>, e);
<a class="jxr_linenumber" name="361" href="#361">361</a>                     }
<a class="jxr_linenumber" name="362" href="#362">362</a>                 }
<a class="jxr_linenumber" name="363" href="#363">363</a> 
<a class="jxr_linenumber" name="364" href="#364">364</a>                 <strong class="jxr_keyword">if</strong> (loop != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="365" href="#365">365</a>                     loop.done = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="366" href="#366">366</a>                     <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="367" href="#367">367</a>                         executor.shutdownNow();
<a class="jxr_linenumber" name="368" href="#368">368</a>                     } <strong class="jxr_keyword">catch</strong> (NullPointerException ex) {
<a class="jxr_linenumber" name="369" href="#369">369</a>                         <em class="jxr_comment">// Some JDK throws NPE here, but shouldn't.</em>
<a class="jxr_linenumber" name="370" href="#370">370</a>                     }
<a class="jxr_linenumber" name="371" href="#371">371</a> 
<a class="jxr_linenumber" name="372" href="#372">372</a>                     <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="373" href="#373">373</a>                         <strong class="jxr_keyword">for</strong> (;;) {
<a class="jxr_linenumber" name="374" href="#374">374</a>                             loop.selector.wakeup();
<a class="jxr_linenumber" name="375" href="#375">375</a>                             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="376" href="#376">376</a>                                 <strong class="jxr_keyword">if</strong> (executor.awaitTermination(1, TimeUnit.SECONDS)) {
<a class="jxr_linenumber" name="377" href="#377">377</a>                                     <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="378" href="#378">378</a>                                 }
<a class="jxr_linenumber" name="379" href="#379">379</a>                             } <strong class="jxr_keyword">catch</strong> (InterruptedException e) {
<a class="jxr_linenumber" name="380" href="#380">380</a>                                 <em class="jxr_comment">// Ignore</em>
<a class="jxr_linenumber" name="381" href="#381">381</a>                             }
<a class="jxr_linenumber" name="382" href="#382">382</a>                         }
<a class="jxr_linenumber" name="383" href="#383">383</a>                     } <strong class="jxr_keyword">catch</strong> (Throwable e) {
<a class="jxr_linenumber" name="384" href="#384">384</a>                         <em class="jxr_comment">// Perhaps security exception.</em>
<a class="jxr_linenumber" name="385" href="#385">385</a>                     }
<a class="jxr_linenumber" name="386" href="#386">386</a> 
<a class="jxr_linenumber" name="387" href="#387">387</a>                     <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="388" href="#388">388</a>                         loop.selector.close();
<a class="jxr_linenumber" name="389" href="#389">389</a>                     } <strong class="jxr_keyword">catch</strong> (Throwable e) {
<a class="jxr_linenumber" name="390" href="#390">390</a>                         logger.warn(<span class="jxr_string">"Failed to close a temporary selector."</span>, e);
<a class="jxr_linenumber" name="391" href="#391">391</a>                     }
<a class="jxr_linenumber" name="392" href="#392">392</a>                 }
<a class="jxr_linenumber" name="393" href="#393">393</a>             }
<a class="jxr_linenumber" name="394" href="#394">394</a> 
<a class="jxr_linenumber" name="395" href="#395">395</a>             <strong class="jxr_keyword">return</strong> constraintLevel;
<a class="jxr_linenumber" name="396" href="#396">396</a>         }
<a class="jxr_linenumber" name="397" href="#397">397</a>     }
<a class="jxr_linenumber" name="398" href="#398">398</a> 
<a class="jxr_linenumber" name="399" href="#399">399</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/jboss/netty/channel/socket/nio/NioProviderMetadata.html">SelectorLoop</a> <strong class="jxr_keyword">implements</strong> Runnable {
<a class="jxr_linenumber" name="400" href="#400">400</a>         <strong class="jxr_keyword">final</strong> Selector selector;
<a class="jxr_linenumber" name="401" href="#401">401</a>         <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">boolean</strong> done;
<a class="jxr_linenumber" name="402" href="#402">402</a>         <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">boolean</strong> selecting; <em class="jxr_comment">// Just an approximation</em>
<a class="jxr_linenumber" name="403" href="#403">403</a> 
<a class="jxr_linenumber" name="404" href="#404">404</a>         <a href="../../../../../../org/jboss/netty/channel/socket/nio/NioProviderMetadata.html">SelectorLoop</a>() <strong class="jxr_keyword">throws</strong> IOException {
<a class="jxr_linenumber" name="405" href="#405">405</a>             selector = Selector.open();
<a class="jxr_linenumber" name="406" href="#406">406</a>         }
<a class="jxr_linenumber" name="407" href="#407">407</a> 
<a class="jxr_linenumber" name="408" href="#408">408</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run() {
<a class="jxr_linenumber" name="409" href="#409">409</a>             <strong class="jxr_keyword">while</strong> (!done) {
<a class="jxr_linenumber" name="410" href="#410">410</a>                 <strong class="jxr_keyword">synchronized</strong> (<strong class="jxr_keyword">this</strong>) {
<a class="jxr_linenumber" name="411" href="#411">411</a>                     <em class="jxr_comment">// Guard</em>
<a class="jxr_linenumber" name="412" href="#412">412</a>                 }
<a class="jxr_linenumber" name="413" href="#413">413</a>                 <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="414" href="#414">414</a>                     selecting = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="415" href="#415">415</a>                     <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="416" href="#416">416</a>                         selector.select(1000);
<a class="jxr_linenumber" name="417" href="#417">417</a>                     } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="418" href="#418">418</a>                         selecting = false;
<a class="jxr_linenumber" name="419" href="#419">419</a>                     }
<a class="jxr_linenumber" name="420" href="#420">420</a> 
<a class="jxr_linenumber" name="421" href="#421">421</a>                     Set&lt;SelectionKey&gt; keys = selector.selectedKeys();
<a class="jxr_linenumber" name="422" href="#422">422</a>                     <strong class="jxr_keyword">for</strong> (SelectionKey k: keys) {
<a class="jxr_linenumber" name="423" href="#423">423</a>                         k.interestOps(0);
<a class="jxr_linenumber" name="424" href="#424">424</a>                     }
<a class="jxr_linenumber" name="425" href="#425">425</a>                     keys.clear();
<a class="jxr_linenumber" name="426" href="#426">426</a>                 } <strong class="jxr_keyword">catch</strong> (IOException e) {
<a class="jxr_linenumber" name="427" href="#427">427</a>                     logger.warn(<span class="jxr_string">"Failed to wait for a temporary selector."</span>, e);
<a class="jxr_linenumber" name="428" href="#428">428</a>                 }
<a class="jxr_linenumber" name="429" href="#429">429</a>             }
<a class="jxr_linenumber" name="430" href="#430">430</a>         }
<a class="jxr_linenumber" name="431" href="#431">431</a>     }
<a class="jxr_linenumber" name="432" href="#432">432</a> 
<a class="jxr_linenumber" name="433" href="#433">433</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> main(String[] args) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="434" href="#434">434</a>         <strong class="jxr_keyword">for</strong> (Entry&lt;Object, Object&gt; e: System.getProperties().entrySet()) {
<a class="jxr_linenumber" name="435" href="#435">435</a>             System.out.println(e.getKey() + <span class="jxr_string">": "</span> + e.getValue());
<a class="jxr_linenumber" name="436" href="#436">436</a>         }
<a class="jxr_linenumber" name="437" href="#437">437</a>         System.out.println();
<a class="jxr_linenumber" name="438" href="#438">438</a>         System.out.println(<span class="jxr_string">"Hard-coded Constraint Level: "</span> + CONSTRAINT_LEVEL);
<a class="jxr_linenumber" name="439" href="#439">439</a>         System.out.println(
<a class="jxr_linenumber" name="440" href="#440">440</a>                 <span class="jxr_string">"Auto-detected Constraint Level: "</span> +
<a class="jxr_linenumber" name="441" href="#441">441</a>                 <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/jboss/netty/channel/socket/nio/NioProviderMetadata.html">ConstraintLevelAutodetector</a>().autodetect());
<a class="jxr_linenumber" name="442" href="#442">442</a>     }
<a class="jxr_linenumber" name="443" href="#443">443</a> 
<a class="jxr_linenumber" name="444" href="#444">444</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/jboss/netty/channel/socket/nio/NioProviderMetadata.html">NioProviderMetadata</a>() {
<a class="jxr_linenumber" name="445" href="#445">445</a>         <em class="jxr_comment">// Unused</em>
<a class="jxr_linenumber" name="446" href="#446">446</a>     }
<a class="jxr_linenumber" name="447" href="#447">447</a> }
</pre>
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